mat ‧ ri ‧ mo ‧ ny /ˈmætrəməni, ˈmætrɪməni $ -moʊni/ BrE AmE noun [uncountable]
[ Date: 1200-1300 ; Language: Old French ; Origin: matremoine , from Latin matrimonium 'being a mother, marriage' , from mater 'mother' ]
formal the state of being married SYN marriage :
They were joined together in holy matrimony.
—matrimonial /ˌmætrəˈməʊni ə l, ˌmætrɪˈməʊni ə l $ -ˈmoʊ-/ adjective